Silyl-substituted urea derivatives

ABSTRACT

New organosilyl- and carbamate-modified urea derivatives have the formula IN WHICH R and R&#39;&#39; are monovalent hydrocarbon radicals, R&#39;&#39;&#39;&#39; and R&#39;&#39;&#39;&#39;&#39;&#39; are hydrogen atoms or monovalent hydrocarbon radicals, Q&#39;&#39; is a bivalent hydrocarbon radical, Q is a monovalent to hexavalent hydrocarbon radical, a is 0, 1, 2 or 3, n is 2, 3 or 4, b is zero or an integer from 1 to 200, and c is the valency number of Q. These urea derivatives are prepared by reacting at a temperature of from -20* to 150* C an aminoalkyl-silane derivative of the formula WITH AN ISOCYANATE-MODIFIED CARBAMIC ACID ESTER OF THE FORMULA The products are to be used as priming agents imparting adhesion to synthetic resins on siliceous surfaces, as surfactants and as intermediates for organo-polysiloxane resins.

UEEQ SE Golitz et a1.

tes atent [451 July it, 1972 [54] SILYL-SUBSTITUTED UREA DEREVATIIVES [72] Inventors: Hans Dietrich Golitz, Koeln-Stammheim; Eberhart Degener, Leverkusen; Gunter Oertel, CologneFlittard. all of Germany;

Hans-Georg Schmelzer, New Martinsville, W. Va.; Walter SimmIer, Odenthal- Schlinghofen, Germany Farbenfabriken Bayer Aktiengesellschait, Leverkusen, Germany 221 Filed: Nov.26, 1969 [21] Appl. No.: 880,430

[73] Assignee:

[30] Foreign Application Priority Data Dec. 4, 1968 Germany ..P 18 12 562.7

[52] U.S.C1. ..260/448.2 N, 117/124 F, 117/123 C,

252/357, 260/465 E, 260/465 G, 260 465 Y,

260 4488 R, 260/4482 E, 260/4982 B 51 Im. Cl. ..C07f 7/18 [58] Field 6: Search ..260/448.8 R, 448.2 N, 44812 E, 260 4482 B [56] References Cited UNITED STATES PATENTS 3,172,874 3/1965 Klebe ..260/448.2 N X 3,208,971 9/1965 Gilkey et a1. ...260/448.2 N X 3,288,754 11/1966 Green ...260/448.2 N X 3,567,753 3/1971 Delaval et a1. ..260/448.2 N

OTHER PUBLICATIONS Noiler, Chemistry of Organic Compounds," 3rd Ed., W. B. Saunders Company, Philadelphia 1965 pps. 337- 338.

Primary Examiner-Tobias E. Levow Assistant Examiner-P. F. Shaver AttorneyBurgess, Dinklage & Sprung [5 7] ABSTRACT New organosilyland carbamate-modified urea derivatives have the formula These urea derivatives are prepared by reacting at a temperature of from 20 to 150 C an aminoalkyl-silane derivative of the formula with an isocyanate-modified carbamic acid ester of the formu- 1a The products are to be used as priming agents imparting adhesion to synthetic resins on siliceous surfaces, as surfactants and as intermediates for organo-polysiloxane resins.

6 Claims, No Drawings SILYL-SUBSTITUTED UREA DERIVATIVES in which R is an alkyl or cycloalkyl radical having up to six carbon atoms or a phenyl radical,

R is an optionally haloor cyano-substituted alkyl, cycloalkyl or aryl radical having up to carbon atoms,

R is a hydrogen atom or a methyl or phenyl radical,

R is a hydrogen atom or an optionally haloor cyano-substituted alkyl, cycloalkyl or aryl radical having up to 10 carbon atoms,

Q is an alkylene radical with two to 10 carbon atoms, a

cycloalkylene, arylalkylene, arylene or alkylarylene radical having up to 10 carbon atoms, or an arylene radical derived from diphenyl-methane by the removal of two hydrogen atoms,

Q is a monovalent to hexavalent saturated aliphatic hydrocarbon radical having up to six carbon atoms,

ais0, 1,2or3,

n is 2, 3 or 4,

b is 0 or an integer from 1 to 200,

c is the valency number of Q.

The meaning of the symbols may of course vary within the ranges expressed above in each position of a molecule.

The invention also provides a process for the preparation of these compounds in which an aminoalkyl-silane derivative of the formula is reacted with an isocyanate-modified carbamic acid ester of the formula at a temperature of from to 150 C, preferably 20 to 60 C, optionally in the presence of a diluent.

In general, this reaction is exothermic; if necessary, it may be moderated by cooling or, if it slows down, its completion may be accelerated by heating. Suitable diluents are inert solvents, such as cyclohexane or toluene, as well as alcoholic hydroxyl compounds, including those of high molecular weight, and mixtures of these types. The hydroxyl compounds can be used for diluting because, as is known, isocyanates react substantially faster with amines than with alcohols. If the diluent is a nonvolatile high molecular weight hydroxyl compound, in particular, for example, a polyalkylene glycol monoalkyl ether of the formula it is often of advantage to retain this polyether in the reaction product. If, on the other hand, a volatile solvent has been used for diluting, this is normally removed from the reaction product by distillation, in some cases advantageously in a thin layer evaporator.

The new products are suitable for use as intermediate layers imparting adhesion to siliceous surfaces which shall be coated with synthetic materials, as interface-active agents and as intermediates for the preparation of organo-polysiloxane resins. Their urea as well as their carbamate groupings impart to them a certain polarity and, in comparison with the non-functional organo-silicon compounds, give rise to a reduction of the sometimes disadvantageous solubility in non-polar solvents. Moreover, their viscosity is comparatively high by reason of the urea grouping, and this is desirable for some organo-polysiloxane resins.

The aminomethyl-silane derivatives used for the preparation of the new compounds may be obtained according to a known method by reacting a chloroor bromo-methylsilane derivative of the formula ((Jlor Hr) with an amine of the formula RNH at a temperature of from 20 to 150 C, preferably 50 to 120 C. lt is advantageous to choose primary amines with boiling points above 40 C, such as cyclohexylamine or isobutylamine, which are preferably used in a fiveto 10-fold excess and may then serve as a component of the reaction product to be obtained and, at the same time, as acid-binder and diluent.

For example, the aminomethyl-silane derivatives used in the following Examples can be prepared as follows:

A. 394 g (2 mols) dimethyl-(bromomethyl)-ethoxy-silane are added with stirring to 992 g (10 mols) cyclohexylamine, whereupon the temperature rises to about 100 C. The reaction mixture is subsequently heated at boiling temperature under reflux for 2 hours, and the precipitated amine salt is filtered off after cooling. By fractional distillation of the filtrate there is obtained, at 18 mm Hg between 1 15 and 1 18 C, the N-cyclohexyl-(aminomethyl)-dimethyl-ethoxy-silane of the B. 356 g (3.6 mols) anhydrous cyclohexylamine are heated to 45 C and 136 g (0.6 mol) methyl-(bromomethyl)-diethoxy-silane are gradually added in such a manner that a temperature of between 60 and 70 C is maintained. The mixture is then heated at 100 C for a further hour and then filtered at room temperature. By fractional distillation of the filtrate there is obtained, at 14 mm Hg between 130 and 133 C, the N-cyclohexyl-(aminomethyl)-methyl-diethoxy-silane of the and of refractive index n3, 1.4460.

C. 103.5 g (0.31 mols) a-bromobenzyl-triethoxy-silane which can be prepared in known manner by bromination of benzyl-trichloro-silane and subsequent ethanolysis are added dropwise at about 60 C to 136 g (1.86 mols) n-butylamine. The reaction mixture is then heated at boiling temperature under reflux for a further 3 hours and freed from the excess amine by reducing the pressure to 15 mm Hg and heating up to C. The residue is dissolved in ml anhydrous cyclohexane, the precipitated butyl ammonium bromide is filtered off, and by fractional distillation there is obtained, at 0.03 mm Hg between 100 and C, the a-(butylamino)- benzyl-triethoxy-silane of the formula (C2H O);Si(l3HNH-C H as a colorless liquid of refractive index nil 1.4705.

l0l044 005K O u The isocyanate modified carbamic acid esters are likewise O CNW 1 obtained according to known processes by reacting dusoj,

cyanates, e.g., toluylene-diisocyanate-(2,4) or hexamethylene H O diisocyanate, with hydroxyl compounds of the formula 3 J P with r, on average, equal to 1 1.6 and s, on average, equal to The diisocyanate is preferably used in a substantial excess so Its Content of OCN groups amounts to P cent y that the number of OCN groups in the initial reaction mixture Weight, its equival'int Weight to 2000 amounts to two to six times the number of HO groups, and the 1,000 8 of a y y-p y which has been diisocyanate remaining at the end of the reaction is removed p p in known manner y alkoxylation 0f 1 mol by distillation, advantageously in a thin layer evaporator. t i ethy ol-propane first With 7.5 mol ethylene oxide and then The isocyanate-modified carbamic acid esters used in the with 53 mol propylene oxide and the molecular weight of following Examples can be prepared in the following way: which amounts, on average, to 3,430 g, are mixed at room 1. 3,000 g of an anhydrous polyalkylene glycol monobutyl temperature with 348 g (2 mols) toluylene-diisocyanate-(2,4), ether which has been prepared in known manner by alkoxylaand the mixture is heated at 70 C for 6 hours. The reaction tion of 1 mol n-butanol first with 17 mols ethylene oxide and product is then freed from the excess toluylene diisocyanate in then with 13 mols propylene oxide and the molecular weight a thin layer evaporator at 0.1 to 0.2 mm Hg and 150 C. As a of which amounts, on average, to 1,550 g, are mixed at 20 to residue there is obtained a pale yellow oil the structure of C with 1,740 g 10 mols) to1uylene-diisocyanate-(2,4) and 20 which corresponds to the formula f c-cm-om OCN NH (3 O \CQHB O/I3\C II4 O/VMCIIZ the mixture is heated at 70 C for 5 hours. The reaction with t, on average, equal to 53 and v, on average, equal to 7.5. product is then freed from the excess toluylene diisocyanate Its content of OCN groups amounts to 3.35 percent by weight, by thin layer distillation at 0.1 to 0.2 mmHg and 150 C; if its equivalent weight accordingly to 1255 g. necessary, this is repeated. As residue there is obtained, 5. 130 g (1 mol) 2-ethyl-hexanol are added dropwise with without substantial loss of yield, a pale yellow oil the structure stirring at 80 to 90 C to 1008 g (6 mols) hexamethylenc of which corresponds to the formula diisocyanate, and the mixture is kept at 80 C for a further 5 f f hours. it is then freed from the excess diisocyanate in a thin J layer evaporator at 0.3 mm Hg and 150 C. There remains a ll clear pale yellow liquid of low viscosity, the structure of which corresponds to the formula Its content of OCN groups amounts to 2.62 per cent by f f weight, its molecular weight accordingly to 1,605 g on OCNCHzNHCO-CH2CH(C2H5)CH CH average. 4 g /a 2. 1,000 g of a polypropylene glycol which has been prepared in known manner by alkoxylation of 1 mol 1,2- dihydroxy-propane with 28.4 mol propylene oxide and the molecular weight of which amounts, on average, to 2,000 g, are mixed with 522 g (3 mols) toluylene-diisocyanate-(2,4),

the content of OCN amounting to 15 percent by weight.

The following Examples are given for the purpose of illustrating the present invention.

and the mixture is heated at 70 C for 6 hours. The reaction EXAMPLE 1 mixture is then freed from the excess toluylene diisocyanate in a thin layer evaporator at 0.2 mm Hg and 150 C. The residue 161 g mol) of an lsocyanate'modlfied Carbamlc acid corresponds to the formula ester Ofthe formula 0 CN- NH-CO CaHaO Cam f ll A o o N- -NHC0-C;H O CzH40--C4Hg H C 0 ii /1a 17 with p, on average, equal to 28.4. Its content of OCN groups amounts to 3.75 per cent by weight, its equivalent weight acare mixed with 21.5 g (0.1 mol) N-cyclohexyl-( aminomethyl)- cordingly to 1,120 g. dimethyl-ethoxy-silane, and the mixture is stirred for 20 hours;

3. 1,500gof a polyalkylene glycol which has been prepared the temperature temporarily rises to 45 C. The product in known manner by alkoxylation of 1 mol 1,2-dihydroxypresent at the end of the reaction is a pale yellow, clear,

propane first with 59.8 mol propylene oxide and then with viscous oil which is soluble in water and has a structure cor- 11.6 mol ethylene oxide and the molecular weight of which responding to the formula CzI 5OSl(CH3) CHzN-CNII NI'I-C-OC3H6O C2II4O CqHD H (II /1s /i1 EXAMPLE 2 amounts to 4,000 g, are mixed at room temperature with 522 g (3 mols) toluylene-diisocyanate-(2,4), and the mixture is 112 g gram equwalem)Ofil"150Cywine-modified heated at C for 6 hours. The reaction mixture is then freed mic i ester as described above under are mixed h from the excess toluylene diisocyanate in a thin layer evapora- 24.5 g (0.! mol) NCyclohexyl-(aminomethyl)-methyltor at 0.1 to 0.2 mm Hg and C. As residue there is ob diethoxy-silane, and the mixture is stirred at room temperatained a clear pale yellow oil corresponding to the formula ture, first under atmospheric pressure for one hour, then at 0.5

mm Hg for 30 minutes for degassing. The remaining product stirred for 30 minutes, and there is obtained a clear viscous, alcorresponds to the formula most colorless liquid of a structure substantially correspond- (CzH O)gSi(CH )CHz-IYI-fi-NH NH(||]O -C3Hq-0 C Hu with p, on average, equal to 28.4. ing to the formula UN1IC1Iz I H /u /a EXAMPLE 3 What we claim is:

l. Silyl-substituted urea derivatives of the general formula 200 g (0.1 gram equivalent) of an isocyanate-modified car- 20 bamic acid ester as described above under (3) are mixed with f 32.5 g (0.1 mol) 0 n-butylamino)-benzyl-triethoxy-silane, ')3 (R)u HNCNHQNHCO \CnH -OT Q and the mixture is stirred at room temperature first under at- 0 b c mospheric pressure for 1 hour, then at 0.5 mm Hg for another hour for degassing There remains a clear, thinly liquid, pale- 2 in which yellow oil, the structure of which corresponds to the formula R is selected from the group consisting of alkyl and cyclo-al- (C2:H5O)3Si'?HNC I2}-CH3 3 l r r NH NH-C-OC H O C H O C Ha ||\O u /A /i O l O 2 2 1130 2 with r, on average, equal to 1 1.6 and s, on average, equal to kyl, having up to six carbon atoms, and phenyl,

9. 5 8 R is a radical having up to 10 carbon atoms, selected from the group consisting of alkyl, cycloalkyl, aryl,

halogenated alkyl, cycloalkyl and aryl, and cyano-substituted alkyl, cycloalkyl and aryl,

EXAMPLE 4 253 g (0.2 gram equivalent) of an isocyanate-modified car- R" is selected from the group consisting of a hydrogen bamtc acid ester as described above under (4) are mixed with atom, a methyl radical and a phenyl radical, 43 g 0.2 mol) N-cyclohexyl-(ammomethyl)-d1methyl-ethoxysilane, and the mixture is stirred for 3 hours; the temperature R is selected from the group consisting of a hydrogen initially rises to about 40 C. The reaction mixture is then atom and a radical having up to 10 carbon atoms, said degassed at room temperature by reducing the pressure to 0,1 radical being selected from the group consisting of alkyl, to 0.5 mm Hg for 1 hour, There remains a clear pale yellow oil cycloalkyl, aryl, halogenated alkyl, cycloalkyl and aryl, the structure of which corresponds to the formula and cyano-substituted alkyl, cycloalkyl and aryl,

F C H OSi(CH )zCHzIII-fiNH o l H3C- IT IH T O -C3Hu-0 CgH4O CH2 CCH2CH3 with 1, on average, equal to 53 an on g q al l 7. Q is a bivalent hydrocarbon radical selected from the group consisting of alkylene having two to 10 carbon atoms, EXAMPLES cycloalkylenc, arylalkylene, arylcnc and alkylarylcne, 27.) g (H gram equivalent) of an isocyanatc-modificd car- 7) 1 of b f P m carbon "l humicncid cqruflhc formula derived from dlphcnylmethanc by the removal of two hydrogen atoms, t t Q is a monovalent to hexavalent saturated aliphatic e e w it n ull 1I 11)-( H (AI; I (H N t N 1 2 z 5 /a hydrocarbon radicalhavmg up to6carbon atoms, 0 a is selected from 0, l, 2 and 3, are gradually added to 325 g (0.1 mol) a-(butylaminoy nisselected from 2,3and 4,

henzyl-tricthoxy silane, while cooling with ice, the mixture is b is selected from O and the integers from I to 200,

c is the valency number of Q.

r being, on average, equal to 11.6 and s being, on average, 2. A compound according to claim 1, having the formula equal to 59.8.

031150-81(CH3)z*CII N--CNH- NIIC-O C3H5O 5. A compound according to claim 1, having the formula 3. A compound according to claim 1, having the formula (C II5O-)1Si(CII )C II2-NC-NII NIIC-O C:4Hu-O CaHe n u o 0 p being, on average, equal to 28.4. I being, on average, equal to 53 and v being, on average, equal 4 A compound according to claim 1, having the formula to 7.5.

4 (CzII5O-)aS1CIIN-CH -CH /NH NH-CO C:H4-O C Ha-O C3H6 /L\ /i o 0 2 2 6. A compound according to claim 1, having the formula UNITE!) STA'IES PA'lEN'l OFFICE CERTIFICATE OF CORRECTIQN Patent No. 3,676,478 Dated July 11, 1972 Inventor(s) Hans Dietrich Golitz et a1 It is certified that error appears in the above-identified patent and that said Letters Patent are hereby correctedas shown below:

Col. 5 line 66 -----(C H 0 --)--g-- CH C CH C should be 1 -(C H -0)- CH C-CH -CH UNITED STA'IKIS PA'lI'IN'I OFFICE CERTIFICATE OF CORRECTION Patent No. 3 676,478 Q D t d July 11., 1972 Inventor(s) Hans Dietrich Golitz et a1 It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Col. 8, Claim No. 5

C 11 OE-Q- C 11 O CH C CH CH should be CIFO i I 0-(cn' 11 -oa;(c 11 -o);,- c11 C-CH2-CH3 Signed end sealed this 6th day of March 1973.

.CSEAL Attes't:

EDWARD M.FLETCHER,JR. ROBERT GOTTSCHALK Attesting Officer I Commissioner of Patents 

2. A compound according to claim 1, having the formula
 3. A compound according to claim 1, having the formula p being, on average, equal to 28.4.
 4. A compound according to claim 1, having the formula
 5. A compound according to claim 1, having the formula
 6. A compound according to claim 1, having the formula 